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Weather Underground Forecast for Thursday, July 31, 2014
An area of low pressure will move across the southern Plains on Thursday, while a separate low pressure system will develop over the upper Great Lakes.
An area of low pressure will move slowly eastward over Texas on Thursday. As this system draws warm, muggy air from the Gulf of Mexico, widespread rain and thunderstorms will develop across the southern tier of the country. Stormy weather can be expected across the southern Plains and the Deep South. Conditions will remain mostly clear across the central and northern Plains, as well as the middle and upper Mississippi Valley. Meanwhile, a weak low pressure system will be situated over Florida, which could trigger scattered showers and thunderstorms over the Southeast and the southern Mid-Atlantic.
To the north, a separate area of low pressure will develop along the upper Great Lakes. This system will bring a chance of isolated thunderstorms to the upper Midwest, the eastern Great Lakes and the Northeast on Thursday. In addition, temperatures will range 10 to 15 degrees below normal across interior New England.
Out west, monsoonal moisture will continue to spread across the Intermountain West and the Great Basin. Widespread rain and thunderstorms will be possible over a handful of states, which could lead to flash flooding in valleys adjacent to sloped terrain. A ridge of high pressure will keep the West Coast mostly dry on Thursday.